How can I switch 87 to 91 octane ?
3 Answers
Why on earth would you think the fuel pump needs to be upgraded to run 91 octane?
Unless you are running a built engine with a ton of boost you would not need more fuel volume or pressure.
1 people found this helpful.
Right, use 87 Octane in your car. If you want to go faster without a lot of money, install a different rear gear differential ratio, like 3:55:1 or install some headers and a 2.5 cat back exhaust system.
